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87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
// Created on: 2014-10-08
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// Created by: Denis BOGOLEPOV
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// Copyright (c) 2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef OPENGL_SAMPLER_H
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#define OPENGL_SAMPLER_H
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#include <OpenGl_Context.hxx>
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class OpenGl_Sampler;
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DEFINE_STANDARD_HANDLE(OpenGl_Sampler, OpenGl_Resource)
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//! Class implements OpenGL sampler object resource that
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//! stores the sampling parameters for a texture access.
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class OpenGl_Sampler : public OpenGl_Resource
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{
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public:
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//! Helpful constant defining invalid sampler identifier
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static const GLuint NO_SAMPLER = 0;
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public:
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//! Creates new sampler object.
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Standard_EXPORT OpenGl_Sampler();
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//! Releases resources of sampler object.
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Standard_EXPORT virtual ~OpenGl_Sampler();
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//! Destroys object - will release GPU memory if any.
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Standard_EXPORT virtual void Release (OpenGl_Context* theContext) Standard_OVERRIDE;
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//! Initializes sampler object.
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Standard_EXPORT Standard_Boolean Init (OpenGl_Context& theContext);
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//! Returns true if current object was initialized.
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Standard_Boolean IsValid() const
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{
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return isValidSampler();
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}
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//! Binds sampler object to the given texture unit.
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Standard_EXPORT void Bind (OpenGl_Context& theContext, const GLuint theUnit = 0);
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//! Unbinds sampler object from the given texture unit.
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Standard_EXPORT void Unbind (OpenGl_Context& theContext, const GLuint theUnit = 0);
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//! Sets specific sampler parameter.
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Standard_EXPORT void SetParameter (OpenGl_Context& theContext, const GLenum theParam, const GLint theValue);
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//! Returns OpenGL sampler ID.
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GLuint SamplerID() const
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{
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return mySamplerID;
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}
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protected:
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//! Checks if sampler object is valid.
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Standard_Boolean isValidSampler() const
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{
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return mySamplerID != NO_SAMPLER;
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}
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protected:
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GLuint mySamplerID; //!< OpenGL sampler object ID
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public:
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DEFINE_STANDARD_RTTIEXT(OpenGl_Sampler,OpenGl_Resource)
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};
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#endif // OPENGL_SAMPLER_H
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